CN111423929B - Nano-fluid magnetic grinding fluid and magnetic field auxiliary micro-lubricating system - Google Patents
Nano-fluid magnetic grinding fluid and magnetic field auxiliary micro-lubricating system Download PDFInfo
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- CN111423929B CN111423929B CN202010148381.3A CN202010148381A CN111423929B CN 111423929 B CN111423929 B CN 111423929B CN 202010148381 A CN202010148381 A CN 202010148381A CN 111423929 B CN111423929 B CN 111423929B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
- B24B55/03—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant designed as a complete equipment for feeding or clarifying coolant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
Abstract
The invention discloses a nanofluid magnetic grinding fluid and a magnetic field assisted minimal quantity lubrication system, wherein magnetic ferroferric oxide nanoparticles in the nanofluid magnetic grinding fluid are adsorbed on the surface of graphene to form magnetic lubrication mixed particles, the nanofluid magnetic grinding fluid forms spray under the action of a minimal quantity lubrication device, the magnetic lubrication mixed particles in the spray are uniformly spread in a processing area of a workpiece under the action of the magnetic field assisted device for lubrication and cooling, and the magnetic lubrication mixed particles are collected by a recovery container and can be reused. According to the invention, graphene is used as a lubricant, and the magnetic effect and the micro-lubricating technology are combined for lubricating and cooling, so that the efficient utilization of the lubricant can be realized, the lubricating and cooling effects are greatly improved, the energy is saved, the environment is protected, and the industrial production requirements are met.
Description
Technical Field
The invention belongs to the technical field of lubricating and cooling in grinding processing, and particularly relates to a nano fluid magnetic grinding fluid and a magnetic field auxiliary micro-lubricating system.
Background
Grinding is the process of machining a workpiece using a grinding wheel or other coated abrasive. Since the abrasive particles are typically machined with a negative rake angle, a large amount of heat is generated during the grinding process. During grinding of difficult materials, this heat is concentrated in the grinding zone due to the high hard and brittle nature and poor thermal conductivity of the material. If the heat can not be led out in time, the temperature of the grinding area can be increased rapidly, so that the problem of grinding burn on the machined surface is caused, the quality of the machined surface is affected, the grinding wheel is easy to wear and scrap too early, and the machining cost is increased.
The traditional grinding machining adopts a pouring type lubricating and cooling method, namely, a large amount of flowing grinding fluid is used for taking away heat of a grinding area. The use of a large amount of grinding fluid not only increases the production cost, but also aggravates the harm to the body and the ecological environment of operators, which is not in line with the current energy-saving and environment-friendly green manufacturing requirements. For this reason, researchers have proposed a minimal quantity lubrication (also referred to as minimum quantity lubrication, MQL) technique in which a compressed gas is mixed with a minimal quantity of a lubricating liquid to form a spray containing micron-sized droplets, and the spray is injected at a high speed through a nozzle into a machining region to perform lubrication and cooling. However, in high-speed grinding, the grinding wheel may form an air flow barrier layer (referred to as an "air barrier layer") around the grinding wheel due to high-speed rotation. The 'air barrier layer' makes atomized grinding fluid difficult to effectively enter a grinding area, so that the lubricating and cooling effects of the 'air barrier layer' are still to be improved.
Therefore, aiming at the difficult problem of grinding of the difficult-to-machine materials, a lubricating and cooling technology which can effectively reduce the temperature of a grinding area and is economic and environment-friendly needs to be developed, and the technology has important significance for improving the machining quality of the difficult-to-machine materials, promoting energy conservation and emission reduction and protecting the ecological environment.
Disclosure of Invention
The invention provides a nano fluid magnetic grinding fluid and a magnetic field auxiliary micro-lubricating system, aiming at solving the problems of poor grinding fluid lubricating and cooling effects, harmful pollution, large potential safety hazard and the like in the grinding of difficult-to-machine materials.
In order to solve the technical problems, the invention adopts the following technical scheme:
a nanometer fluid magnetic grinding fluid and magnetic field auxiliary micro-lubricating system is characterized in that the nanometer fluid magnetic grinding fluid is prepared from distilled water, sodium deoxycholate (0.3-1.0 wt.%), ethylene glycol (1.0-5.0 wt.%), and ferroferric oxide (Fe)3O4) The nano-particles and the graphene powder are prepared, and the prepared grinding fluid contains magnetic Fe3O4The nano-particles can be adsorbed on the surface of graphene to form magnetic lubricating mixed particles, the magnetic lubricating mixed particles are uniformly dispersed in grinding fluid, the magnetic field auxiliary micro-lubricating system comprises an air source, a barometer, 2 flow control valves, a grinding fluid storage, a water pump, a micro-lubricating device, a nozzle, a magnetic field auxiliary device, a recovery container and the like, wherein the micro-lubricating device can be purchased and configured according to performance requirements, the micro-lubricating system is used for atomizing the grinding fluid, the magnetic field auxiliary device is installed above a workbench and comprises 2 side magnetic poles and 1 tail end magnetic pole and is used for promoting the magnetic lubricating mixed particles in the grinding fluid and the grinding fluid to enter a grinding area for lubricating and cooling, and the lubricating and cooling process of the nano-fluid magnetic grinding fluid under the magnetic field auxiliary micro-lubricating system is:
1) the nano fluid magnetic grinding fluid is filled into a grinding fluid storage device, the grinding fluid storage device, a water pump and a flow control valve are connected into a micro lubricating device through pipelines, an air source can be provided by an air tank or an air pump, the air source, a barometer and the other flow control valve are also connected into the micro lubricating device through pipelines, the grinding fluid is input into the micro lubricating device through the water pump, the air source provides high-pressure air flow to enter the micro lubricating device, the air flow and the liquid flow can be respectively controlled and adjusted through 2 flow control valves, the air flow and the grinding fluid flow form spray under the action of the micro lubricating device and are sprayed to the front area of a contact area between a grinding wheel and.
2) The sprayed spray can be transversely spread under the action of a magnetic field with certain action frequency generated by 2 side magnetic poles of the magnetic field auxiliary device, the 2 side magnetic poles are respectively arranged at two sides of the device base frame and are positioned at the same horizontal position with a workpiece, the action force of the spray under the action of a constant magnetic field generated by a tail end magnetic pole can be greatly enhanced, so that a 'gas barrier layer' formed by high-speed rotation of the grinding wheel is overcome and enters a contact region between the grinding wheel and the workpiece, the tail end magnetic pole is arranged at the tail end of the device base frame, the 2 side magnetic poles and 1 tail end magnetic pole are respectively composed of an iron core, a copper coil, a polymer partition plate, a joint and the like, the copper coil is wound on the iron core, the iron core is arranged on the polymer partition plate, the polymer partition plate is arranged on the device base frame, the 2 side magnetic poles are connected with a, the tail end magnetic pole is connected with the control unit through the joint, the action size of the magnetic field is controlled by the control unit, namely, under the action of the magnetic field auxiliary device, the grinding fluid and the magnetic lubrication mixed particles in the grinding fluid can be uniformly spread in a processing area of a workpiece, and therefore lubrication and cooling are carried out.
3) The recovery container is arranged below the tail end magnetic pole, the tail end magnetic pole generates a constant magnetic field acting force in the working period, and the magnetic field acting force is greater than that of the 2 side magnetic poles, so that most of magnetic lubrication mixed particles in the region above the base frame of the device lifted by the high-speed rotation of the grinding wheel can be adsorbed by the tail end magnetic pole, after the processing is finished, the power supply is turned off, and the magnetic lubrication mixed particles are collected into the recovery container and can be reused.
Distilled water in the nano-fluid magnetic grinding fluid can also be replaced by biodegradable oil such as palm oil.
The 2 side magnetic poles in the magnetic field auxiliary device are arranged in different directions, and the magnetic fluxes are the same.
The end magnetic poles in the magnetic field auxiliary device can also adopt permanent magnets.
A protective plate is arranged above the base frame of the device to prevent grinding fluid from being splashed out by the grinding wheel.
Compared with the prior art, the invention has the following advantages and remarkable effects:
(1) the grinding specific energy can be greatly reduced, and the lubricating and cooling effects are improved. The prepared grinding fluid adopts the graphene prepared by the reduction-oxidation method as a lubricant, although the performance of the graphene prepared by the reduction-oxidation method is reduced to some extent compared with the graphene prepared by a physical method such as a glue tearing method, the yield is high, the cost is low, and the mechanical property can completely meet the technical requirements in the field of grinding processing. Meanwhile, in the process of preparing graphene from graphene oxide through chemical reduction reaction, ferric chloride hexahydrate (FeCl)3·H2O) as a reactant, FeCl can be reacted by a high-temperature reaction3Reduction to Fe3O4And through graphene oxideEnergy groups are loaded on graphene products, namely Fe with magnetism3O4The nano particles can be adsorbed on the surface of graphene to form magnetic lubricating mixed particles, and the mixed particles not only integrate mechanical properties such as excellent strength and toughness of the graphene, but also have magnetic properties. The magnetic lubricating mixed particles can be uniformly dispersed in the grinding fluid under the action of other additives. After the atomized grinding fluid is sprayed out through the nozzle, the atomized grinding fluid can be uniformly and transversely spread under the action of 2 side magnetic poles of the magnetic field auxiliary device; under the action of the tail end magnetic pole, the gas barrier layer formed by the high-speed rotation of the grinding wheel is overcome, and the gas barrier layer enters a contact area between the grinding wheel and the workpiece. Therefore, under the action of the magnetic field auxiliary device, the grinding fluid and graphene in the grinding fluid can be uniformly spread on the surface of a workpiece and can enter a grinding area, so that the excellent mechanical property of the graphene is utilized, the grinding force and the grinding specific energy can be effectively reduced, and the lubricating and cooling effects are greatly improved.
(2) Can realize pollution-free emission, and is energy-saving and environment-friendly. The grinding fluid does not contain substances harmful to the environment, and the use amount is small by adopting a micro-lubrication technology. In addition, the magnetic lubrication mixed particles in the area above the workbench can be adsorbed by the tail end magnetic pole and can be collected into a recovery container for reuse, so that pollution-free discharge is realized, and the device is energy-saving and environment-friendly.
(3) The use cost is low, and the industrial production requirements are met. The grinding fluid has relatively high cost of other components except graphene. However, the graphene prepared by the reduction oxidation method is adopted in the grinding fluid, so that the content of the graphene in the grinding fluid is low, and the consumption of the grinding fluid and the graphene is low due to the adoption of a trace lubrication technology. Therefore, the cost is low, and the requirement of industrial production is met.
Therefore, the nano fluid magnetic grinding fluid and the magnetic field auxiliary micro lubricating system provided by the invention can greatly reduce the grinding specific energy, improve the lubricating and cooling effects, are energy-saving and environment-friendly, have low cost and completely meet the requirements of industrial production.
Drawings
FIG. 1 is a schematic diagram of a magnetic field assisted minimal quantity lubrication system.
Fig. 2 is a schematic view of a pole assist device.
Fig. 3 is a schematic view of a magnetic pole.
In FIGS. 1-3: 1-gas source, 2-barometer, 3-flow control valve, 4-grinding fluid reservoir, 5-water pump, 6-minimal quantity lubrication device, 7-nozzle, 8-grinding wheel, 9-magnetic field auxiliary device, 10-workbench, 11-machine tool, 12-variable frequency control unit, 13-control unit, 14-side magnetic pole, 15-workpiece, 16-device base frame, 17-end magnetic pole, 18-protective plate, 19-recovery container, 20-joint, 21-polymer partition, 22-copper coil, 23-iron core
Detailed Description
To facilitate understanding by those skilled in the art, the present invention will be described in detail below with reference to fig. 1 to 3.
The invention provides a nano fluid magnetic grinding fluid which is prepared from distilled water, sodium deoxycholate (0.3-1.0 wt.%), ethylene glycol (1.0-5.0 wt.%), and ferroferric oxide (Fe)3O4) The nano-particles and the graphene powder are prepared, and the prepared grinding fluid contains magnetic Fe3O4The nano particles can be adsorbed on the surface of graphene to form magnetic lubricating mixed particles, and sodium deoxycholate, ethylene glycol and other additives can promote the magnetic lubricating mixed particles to be uniformly dispersed in the grinding fluid, distilled water in the nano fluid magnetic grinding fluid can be replaced by biodegradable oil such as palm oil, the graphene has excellent mechanical properties such as strength and toughness, and can be used as a lubricant between abrasive particles and a workpiece, so that the friction coefficient and the grinding force between the abrasive particles and the workpiece can be greatly reduced, the grinding specific energy is further reduced, and the lubricating and cooling effects of the grinding fluid are improved.
The invention provides a magnetic field auxiliary micro-lubricating system, which comprises an air source (1), a barometer (2), a flow control valve (3), a grinding fluid storage (4), a water pump (5), a micro-lubricating device (6), a nozzle (7), a magnetic field auxiliary device (9), a recovery container (19) and the like, wherein the grinding fluid storage (4), the water pump (5) and the flow control valve (3) are connected into the micro-lubricating device (6) through pipelines, the air source (1) can be provided by an air tank or an air pump, the grinding fluid, the barometer (2) and the other flow control valve (3) are also connected into the micro-lubricating device (6) through pipelines, the grinding fluid is input into the micro-lubricating device (6) by the water pump (5), the air source (1) provides high-pressure air flow to enter the micro-lubricating device (6), the air flow and the liquid flow can be respectively controlled and adjusted through the 2 flow control valves (, the magnetic field auxiliary device is characterized in that the magnetic field auxiliary device is sprayed to the front area of a contact area between a grinding wheel (8) and a workpiece (15) through a nozzle (7), the workpiece (15) is fixed in a device rack (16), a micro lubricating device (6) is sold on the market and only needs to be purchased and configured according to performance requirements to atomize grinding fluid, the magnetic field auxiliary device (9) is installed above a workbench (10) and comprises 2 side magnetic poles (14) and 1 tail end magnetic pole (17) to promote the grinding fluid and magnetic lubricating mixed particles in the grinding fluid to enter the grinding area for lubricating and cooling, and a recovery container (19) is installed below the tail end magnetic pole (17) to recover the magnetic lubricating mixed particles in the grinding fluid.
2 side magnetic poles (14) in the magnetic field auxiliary device (9) are respectively arranged on two sides of a device pedestal (16) and are positioned at the same horizontal position with a workpiece (15), 1 tail end magnetic pole (17) is arranged at the tail end of the device pedestal (16), the 2 side magnetic poles (14) and the 1 tail end magnetic pole (17) are respectively composed of an iron core (23), a copper coil (22), a polymer partition plate (21) and a connector (20), the copper coil (22) is wound on the iron core (23), the iron core (23) is arranged on the polymer partition plate (21), the polymer partition plate (21) is arranged on the device pedestal (16), the 2 side magnetic poles (14) are connected with a variable frequency control unit (12) through the connector (20), the size and the action frequency of a magnetic field are controlled by the variable frequency control unit (12), and the tail end magnetic pole (17) is connected with the control unit (13) through the connector (20), the size of the action of a magnetic field is controlled by means of a control unit (13), the tail end magnetic pole (17) generates a constant magnetic field in the working period, the action of the magnetic field is larger than that of 2 side magnetic poles, the 2 side magnetic poles (14) are arranged in different directions, and the magnetic fluxes are the same, so that the generated magnetic field action force is equal in size and opposite in direction, the action size and the action time of the magnetic field can be adjusted by a variable frequency control unit (12), the transverse spreading area of magnetic lubrication mixed particles is controlled, and in addition, a protection plate (18) is installed above a device base frame (16), and grinding fluid is prevented from being splashed outside a magnetic field auxiliary device (9) by a grinding wheel (8).
The working principle of the invention is briefly described as follows: the nano fluid magnetic grinding fluid contains magnetic Fe3O4The nano particles can be adsorbed on the surface of graphene to form magnetic lubricating mixed particles, the magnetic lubricating mixed particles are uniformly dispersed in grinding fluid, after the nano fluid magnetic grinding fluid is filled into a grinding fluid storage (4), the nano fluid magnetic grinding fluid can enter a micro lubricating device (6) under the action of a water pump (5), high-pressure air flow provided by an air source (1) also enters the micro lubricating device (6), so that spray is formed under the action of the micro lubricating device (6), the spray is sprayed to the front area of a contact area between a grinding wheel (8) and a workpiece (15) through a nozzle (7), under the action of 2 side magnetic poles (14) of a magnetic field auxiliary device (9), the magnetic lubricating mixed particles in the grinding fluid and the grinding fluid can be uniformly spread in a processing area of the workpiece (15), under the action of a tail end magnetic pole (17) of the magnetic field auxiliary device (9), an 'air barrier layer' formed by high-speed rotation of the grinding wheel (8) can be overcome, the magnetic lubrication mixed particles which enter the contact area between the grinding wheel (8) and the workpiece (15), namely, under the action of the magnetic field auxiliary device (9), the grinding fluid and the magnetic lubrication mixed particles in the grinding fluid can effectively enter the grinding area so as to be lubricated and cooled, the magnetic lubrication mixed particles suspended in the area above the device base frame (16) (including the particles which are not lubricated and cooled after being sprayed out from the nozzle (7) and are lifted by the grinding wheel (8)) can be adsorbed to the surface of the magnetic lubrication mixed particles by the tail end magnetic pole (17), after the processing is finished, the power supply is turned off, the magnetic lubrication mixed particles are collected into a recovery container (19) and reused, if the tail end magnetic pole (17) is a permanent magnetic pole, a tool such as a brush is needed to brush into the recovery container (19), in addition, the recovered particle powder can contain abrasive dust, and therefore, the collection and the screening and classification are needed.
Claims (5)
1. A magnetic field auxiliary micro-lubricating system based on nano-fluid magnetic grinding fluid is characterized in that the nano-fluid magnetic grinding fluid is prepared from distilled water, sodium deoxycholate, ethylene glycol, ferroferric oxide nano-particles and graphene powder, and the prepared grinding fluid contains magnetic Fe3O4The nano particles can be adsorbed on the surface of graphene to form magnetic lubricating mixed particles, the magnetic lubricating mixed particles are uniformly dispersed in the grinding fluid, and the magnetic field assists trace lubricationThe slip system is by air supply (1), barometer (2), 2 flow control valve (3), grinding fluid accumulator (4), water pump (5), trace lubricating arrangement (6), nozzle (7), magnetic field auxiliary device (9), recovery container (19) are constituteed, wherein trace lubricating arrangement (6) are bought and are prepared according to the performance requirement, for atomizing the grinding fluid, install in workstation (10) top magnetic field auxiliary device (9), contain 2 side magnetic pole (14) and 1 terminal magnetic pole (17), it carries out the lubrication cooling to get into the grinding district for promoting the lubricated hybrid particles of magnetism in grinding fluid and the grinding fluid, the lubrication cooling process of nano-fluid magnetism grinding fluid under the supplementary trace lubricating system in magnetic field is as follows:
1) the nano fluid magnetic grinding fluid is filled into a grinding fluid storage device (4), the grinding fluid storage device (4), a water pump (5) and a flow control valve (3) are connected into a micro lubricating device (6) through pipelines, an air source (1) is provided by an air tank or an air pump, the grinding fluid and the barometer (2) and the other flow control valve (3) are also connected into the micro-lubricating device (6) through pipelines, the grinding fluid is input into the micro-lubricating device (6) through a water pump (5), a high-pressure air flow is provided by an air source (1) and enters the micro-lubricating device (6), the air flow and the liquid flow are respectively controlled and adjusted through the 2 flow control valves (3), the air flow and the grinding fluid flow form spray under the action of the micro-lubricating device (6) and are sprayed to the front area of a contact area of the grinding wheel (8) and a workpiece (15) through a nozzle (7), and the workpiece (15) is fixed in a device pedestal (16;
2) the sprayed spray can be spread out transversely under the action of a magnetic field with certain action frequency generated by 2 side magnetic poles (14) of a magnetic field auxiliary device, the 2 side magnetic poles (14) are respectively arranged at two sides of a device base frame (16) and are positioned at the same horizontal position with a workpiece (15), the acting force of the spray can be greatly enhanced under the action of a constant magnetic field generated by a tail end magnetic pole (17), so that the spray can overcome an 'air barrier layer' formed by high-speed rotation of a grinding wheel (8) and enter a contact region of the grinding wheel (8) and the workpiece (15), the tail end magnetic pole (17) is arranged at the tail end of the device base frame (16), the 2 side magnetic poles (14) and 1 tail end magnetic pole (17) are respectively composed of an iron core (23), a copper coil (22), a polymer partition plate (21) and a joint (20), the copper coil (22) is wound on the iron core (23), and the iron core (23) is arranged on the, the polymer partition plate (21) is installed on a device base frame (16), 2 side magnetic poles (14) are connected with a variable frequency control unit (12) through joints (20), the variable frequency control unit (12) is used for controlling the size and the action frequency of a magnetic field, a tail end magnetic pole (17) is connected with a control unit (13) through the joints (20), and the control unit (13) is used for controlling the size of the magnetic field action, namely under the action of a magnetic field auxiliary device (9), grinding fluid and magnetic lubrication mixed particles in the grinding fluid can be uniformly spread in a processing area of a workpiece (15), so that lubrication and cooling are carried out;
3) the recovery container (19) is arranged below the tail end magnetic pole (17), the tail end magnetic pole (17) generates a constant magnetic field acting force in the working period, the magnetic field acting force is larger than that of the 2 side magnetic poles (14), therefore, most of the magnetic lubrication mixed particles lifted to the area above the base frame (16) of the device through the high-speed rotation of the grinding wheel (8) are adsorbed by the tail end magnetic pole (17), after the processing is finished, the power supply is turned off, and the magnetic lubrication mixed particles are collected into the recovery container (19) for reuse.
2. The magnetic field assisted minimal quantity lubrication system based on the nanofluid magnetic grinding fluid as claimed in claim 1, wherein distilled water in the nanofluid magnetic grinding fluid is replaced by palm oil to prepare the nanofluid magnetic grinding fluid.
3. The magnetic field assisted minimal lubrication system based on nanofluid magnetic grinding fluid according to claim 1, characterized in that 2 side magnetic poles (14) in the magnetic field assisted device (9) are arranged in opposite directions and have the same magnetic flux.
4. A magnetic field assisted minimal quantity lubrication system based on nanofluid magnetic grinding fluid according to claim 3, characterized in that the end magnetic poles (17) in the magnetic field assisting device (9) are replaced by permanent magnets.
5. The magnetic field assisted minimal quantity lubrication system based on nanofluid magnetic grinding fluid according to claim 4, characterized in that a protective plate (18) is installed above the device pedestal (16) to prevent the grinding fluid from being splashed out by the grinding wheel (8).
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| KR101207366B1 (en) * | 2010-06-18 | 2012-12-04 | 인하대학교 산학협력단 | Grinding Apparatus, Method By Using Magneto Rheological Fluid |
| CN102287606B (en) * | 2011-07-17 | 2014-03-12 | 青岛理工大学 | Nano particle jet flow micro-scale lubricating and grinding three-phase flow supply system |
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